Idle Tables \ VSS screw-up

[Jason Weir]

Shannen Durphey wrote:
> 
> Jason Weir wrote:
> 
> >
> > BTW has anyone seen a setting in the 7747 stuff as to VSS pulses per
> > mile?  Turbo City sent me the wrong one and it reads half speed. They
> > offered what they called a "2-Pulse" and a "4-Pulse" models so I got the
> > 2 pulse model, I thought that would have satisfied the 7747's 2000 ppm
> > requirement or does the 7747 really need a 4000 ppm? I have patched it
> > by setting all the VSS stuff to half the chip value but I know thats
> > only a temporary Band-Aid.
> >
> > thanks
> >
> > Jason
> You need to verify the speed signal is DC, and is of the correct
> frequency.  How can you say the ecm is not using a 2000 ppm signal
> unless you know your vss is making a 2000 ppm signal?  You might also
> be able to use a DRAC as a buffer.  I think it provides a buffered 1:1
> output on one of the pins.
> Shannen

I guess I expected too much from Turbo City, I told them what I had and
that I needed a 2000 ppm unit for a 7747 TBI setup and they sent me what
they said I needed, I'll call them back and talk at them again, maybe if
that don't work I'll fool around with the DRAC thingy.

thanks for the info

Jason